---
title: Connection
description: "**MPR, MPV, MPO** | 24 V a.c. L1 / d.c. + | black | | --- | --- | | 24 V a.c. L2 / d.c. – common ground | blue | | Control Voltage, IN 0 – 10 V…"
url: "https://faqdoc.info/en/systemauswahl/motoric-valve-drive-6/motoric-valve-drive-24-v-am3-en/connection/"
updated: "2024-07-22"
category: Motoric Valve Drive 24 V (AM3)
---

# Connection

**MPR, MPV, MPO**

| 24 V a.c. L1 / d.c. + | black |
| --- | --- |
| 24 V a.c. L2 / d.c. – common ground | blue |
| Control Voltage, IN 0 – 10 V | red |
| Feedback 0 – 10 V, OUT < 1 mA | yellow |

![](https://faq.testumgebung.digital/wp-content/uploads/2024/07/MPx_468x5_stetig_Verdrahtung_AM3.svg)

**Connection line**
We recommend the following maximum cable lengths for installing a 24 V system:

| **Cable** | **Section** | **Length** |
| --- | --- | --- |
| Standard DDC line | 0.22 mm² | 20 m |
| J-Y(ST)Y | 0.8 mm² | 45 m |
| NYM/NYIF | 1.5 mm² | 136 m |

**Transformer/power supply unit**
A safety isolating transformer according to EN 61558-2-6 or a switching power supply according to EN 61558-2-16 must always be used.
The dimensioning of the transformer or the switching power supply results from the maximum making capacity of the OEM Actuators.

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M3P/M3V: **3-point control**

| **Feature** | **Description** |
| --- | --- |
| L2 common ground (blue) | Ground |
| L1-2 (voltage to red) | Valve pressure plate retracts |
| L1-1 (voltage to black) | Valve pressure plate extracts |
| No voltage to red/black | Valve pressure plate remains in the current position |

![](https://faq.testumgebung.digital/wp-content/uploads/2023/09/M3F_468x5_3_Punkt_Verdrahtung_2241.svg)

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M3P/M3V: **2-point control**

| **Feature** | **Description** |
| --- | --- |
| L2 common ground (blue) | Ground |
| L1-2 (voltage to red) | Valve pressure plate retracts |
| L1-1 (voltage to black) | Valve pressure plate extracts |
| No voltage to red/black | Valve pressure plate remains in the current position |

![](https://faq.testumgebung.digital/wp-content/uploads/2024/07/Verdrahtung_M3P.svg)